Synthesizer



FIG. 1 is a top plan view of a synthesizer showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a bottom plan view;

FIG. 4 is a front elevational view; and

FIG. 5 is a rear elevational view.

The ornamental design for a synthesizer, substantially as shown anddescribed.